LXR linux/tools/perf/util/mmap.h

   1#ifndef __PERF_MMAP_H
   2#define __PERF_MMAP_H 1
   3
   4#include <internal/mmap.h>
   5#include <linux/compiler.h>
   6#include <linux/refcount.h>
   7#include <linux/types.h>
   8#include <linux/ring_buffer.h>
   9#include <stdbool.h>
  10#include <pthread.h> // for cpu_set_t
  11#ifdef HAVE_AIO_SUPPORT
  12#include <aio.h>
  13#endif
  14#include "auxtrace.h"
  15#include "event.h"
  16
  17struct aiocb;
  18
  19struct mmap_cpu_mask {
  20        unsigned long *bits;
  21        size_t nbits;
  22};
  23
  24#define MMAP_CPU_MASK_BYTES(m) \
  25        (BITS_TO_LONGS(((struct mmap_cpu_mask *)m)->nbits) * sizeof(unsigned long))
  26
  27/**
  28 * struct mmap - perf's ring buffer mmap details
  29 *
  30 * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
  31 */
  32struct mmap {
  33        struct perf_mmap        core;
  34        struct auxtrace_mmap auxtrace_mmap;
  35#ifdef HAVE_AIO_SUPPORT
  36        struct {
  37                void             **data;
  38                struct aiocb     *cblocks;
  39                struct aiocb     **aiocb;
  40                int              nr_cblocks;
  41        } aio;
  42#endif
  43        struct mmap_cpu_mask    affinity_mask;
  44        void            *data;
  45        int             comp_level;
  46};
  47
  48struct mmap_params {
  49        struct perf_mmap_param core;
  50        int nr_cblocks, affinity, flush, comp_level;
  51        struct auxtrace_mmap_params auxtrace_mp;
  52};
  53
  54int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
  55void mmap__munmap(struct mmap *map);
  56
  57union perf_event *perf_mmap__read_forward(struct mmap *map);
  58
  59int perf_mmap__push(struct mmap *md, void *to,
  60                    int push(struct mmap *map, void *to, void *buf, size_t size));
  61
  62size_t mmap__mmap_len(struct mmap *map);
  63
  64void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag);
  65
  66#endif /*__PERF_MMAP_H */
  67